Furnace-cleaner.



P. MOLSTAD.

FURNACE CLEANER.

APPLICATION FILED DEC. 20, 1913.

1, 109,451 Patented Sept. 1, 1914. 2 SHEBTSSHEET 1.

//Z 5075M; a5 4%- P. MOLSTAD. FURNACE CLEANER,

APPLICATION FILED DEG.20, 1913.

1,109,451, Patented Sept. 1,1914.

2 SHBBTSSHEET 2.

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PETER MOLSTAD, OF MACOUN, SASKATCHEWAN, CANADA.

FURNACE-CLEANER To Z trho-m 1' 2, may concern:

Be it known that I, PETER MOLSTAD, a itiZen of Canada, residing atMacoun. 1n the Province of Saskatchewan and Dominion of Canada, haveinvented new and useful Improvements in Furnace-Cleaners, of which thefollowing is a specification.

This invention relates to improvements in steam boiler furnaces andespecially with reference to improved means for shaking the grate barsand also for simultaneously removing the ashes from the ash pit belowthe grate bars, so as to clean out the ash pit at the same time that thegrate bars are shaken or rocked. the object of the invention being toprovide improved devices of this character which may be" readilyinstalled in a steam boiler furnace, readily controlled and operated andwhich may be manufactured at moderate cost.

The invention consists in the construction, combination and arrangementof devices hereinafter described and claimed.

ln the accompanying drawings: Figure 1 is a side elevation of a portionof a steam boiler furnace provided with grate shaking and ash cleaningor-removing means constructed in accordance with my invention. Fig. 2 isa vertical transvers sectional view of the same. Fig. 3 is .a verticallongitudinal sectional view of the same. Figs. 1 and 5 are detail views.

For the purposes of this specification a steam boiler is indicated at land its furnace at The boiler and furnace may be of any suitable typeand of any desired (mnstructimx. The furnace is provided with grate bars3 which have bearings as at -t and are adapted to rock or oscillate andeach grate bar is provided with a downwardly extending rock arm 5. Theserock arms are connected together by a rod 6. A rock shaft 7 has itshearings in the sides of the furnace and is arranged at a point in thefruit portion of the ash pit, below the grate bars. This rock shaft hasa crank arm 7 which is connected by a pitman 10 to the rod (3. At oneend of the said rock shaft is a crank arm 29 which is at substantiallyright angles to the arm T.

An endle s rake and conveyor is arranged so that its upper lead isadapted tomove l'itll'\-':12(ll on the bottom of the ash. pit. Thisendless rake and conveyor con'ipriscs a pair of shafts ll-12. mounted inbearings respectively at the front and rear sides of Specification ofLetters Patent.

. the furnace and respectivelyprovided with sprocket wheels 13-44.Endless sprocket chains 15 engage the said sprocket wheels and thesechains are connected together by transversely arranged rakes and flights1.6 which, on the upper leads of the chains, are arranged to moverearwardly and to bear on the upper surfaces of the bottom of the ashpit, the lower leads of said chains being arranged below the bottom ofthe; ash pit. In the rear side of the ash pit is a discharge opening 17through which the endless rake and carrier extends. The shaft 11 is alsopro vided at one end with a sprocket wheel 18. A driving shaft 19 ishere shown as ar ranged at the upper side of the furnace and mounted inbearings 20. This shaft has a sprocket wheel 21 which is loose thereonand fast to and on opposite sides of said sprocket wheel 21 are aneccentric 22 and a centric and cone pulley are movable longitudinally onthe shaft 19 a slight distance and the cone pulley is adapted to beengaged with or disengaged from a friction driving pulley 24 which isfirmly secured to the shaft 19 as by means of a keybolt An endlesssprocket chain 26 connects the pulleys 21 and 18. An eccentric strap 27operates on the eccentric 29 and is connected by a. rod 28 to the arm 29of the rock shaft 7. A shifter lever 30 is pivotally mounted as at 31and has a fork 32 which is engaged with an annular groove on a hub 33which projects from the eccentric. An operating lever 34 is alsoprovided which is pivotally connected as at 35 .to a segment 36 and maybe locked to the segi'nentby means of a dog 37 of usual construction.This lever is connected by a. rod 38 to the arm 39 of the shifter lever.

It will be understood from. the foregoing description and by referenceto the drawings that the shifter lever may be actuated by the lever 34to engage the cone pulley 23 with the friction cone pulley 24 ordisengage the same therefrom. The shaft 19 being in operation when thepulley 22?, is engaged with the pulley 24 the chain 26 is operated bythe sprocket wheel 21 and hence imparts motion to the endless rake andconveyer and at the same time the rotation of the eccentric with thesaid wheel 21 causes the rod 28 to reciprocate and impart rocking motionto the rock shaft 7 through the crank arm 29. The rocking motion of thePatented Sept. 1,1914. 1 Application filed December 20, 1913. Serial No.808,041. I Y

cone pulley 23. The sprocket wheel 21, ec-

. claim rock shaft causes the'crzink 'arm 7, pitman l0 and rod 6 to rockand shake the grate bars and thus cause the ashesto fell from the fire.As the ashes dropjfrom between the grate bars they are caught andcarried out of the ash pit by the endless rake and conveyer A andhenoethe furnace is kept clean.

Having thus described my n entiqgi In ajurnace, movable grate bars, anash pit below the gr te-bars, an endless rake and conveyer"irranged"withits upper lead on the bottoni of aind'exte'nding through theash"""pit--, said'eridless rake 'and conveyer havingen actuatin shalft'provided with riving shaft, a* sprocket wheel tind a'n eccentriclooseonsaiddriving sprocket wheel, a

shaft and secured together vfor simultaneous rotation, means to connectsaid sprocket wheel and eccentric to said driving 5 aft for rotationtherewith, an endless sprocketchainconnecting the said sprocket wheels,a rocking element connected to the movable grate bars and an eccentricstrap on the eccentric wheel -and

